Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8245792 | Drill bit with weight and torque sensors and method of making a drill bit | Tu Tien Trinh, Eric C. Sullivan | 2012-08-21 |
| 8162077 | Drill bit with weight and torque sensors | Keith Glasgow, Sorin Gabriel Teodorescu, Eric C. Sullivan, Tu Tien Trinh, Xiaomin Cheng | 2012-04-24 |
| 8100196 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Keith Glasgow, Tu Tien Trinh, Paul J. Lutes | 2012-01-24 |
| 7987925 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, R. Keith Glasgow, Jr., Tu Tien Trinh, Paul J. Lutes | 2011-08-02 |
| 7946357 | Drill bit with a sensor for estimating rate of penetration and apparatus for using same | Tu Tien Trinh, Eric C. Sullivan | 2011-05-24 |
| 7849934 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Keith Glasgow, Tu Tien Trinh, Paul J. Lutes | 2010-12-14 |
| 7604072 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Keith Glasgow, Tu Tien Trinh, Paul J. Lutes | 2009-10-20 |
| 7594552 | Expandable reamer apparatus for enlarging boreholes while drilling | Steven R. Radford, Kelly D. Ireland | 2009-09-29 |
| 7549485 | Expandable reamer apparatus for enlarging subterranean boreholes and methods of use | Steven R. Radford, Kelly D. Ireland, Robert A. Laing, James L. Overstreet, Greg W. Presley +3 more | 2009-06-23 |
| 7510026 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Keith Glasgow, Tu Tien Trinh, Paul J. Lutes | 2009-03-31 |
| 7506695 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Keith Glasgow, Tu Tien Trinh, Paul J. Lutes | 2009-03-24 |
| 7497276 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Keith Glasgow, Tu Tien Trinh, Paul J. Lutes | 2009-03-03 |
| 7308937 | Expandable reamer apparatus for enlarging boreholes while drilling and methods of use | Steven R. Radford, Kelly D. Ireland, Anurag Gautam, Robert A. Laing, Matthew Mumma | 2007-12-18 |
| 7036611 | Expandable reamer apparatus for enlarging boreholes while drilling and methods of use | Steven R. Radford, Kelly D. Ireland, Anurag Gautam, Robert A. Laing, Matthew Mumma | 2006-05-02 |